We have entered the "That works, but what if...?" part of the regex tutorial!
Like so many types of coding, use of regex is designed to match the situation at hand. One needs to
identify and describe all possible formats of text that should match the expression. We otherwise enter an endless loop here. Feel free to adjust the regex to match what you need. If you cannot delineate, identify, or describe the formats, then it probably cannot be done. Providing a single example of text, as done in your initial post, is typically insufficient, because that example can be described in many different ways, most of which would not fit the need at hand.
The regex that I wrote looks for a single character,
[^,], that is not a comma. Where needed,
+ can be applied to look for one or more such characters.
Explained:
Commonly used symbols and syntax